<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
		<style>
			body{
				/* background-image: url(img/1.jpg);
				background-repeat:no-repeat; */
				/* 背景随着页面滚动:scroll,默认值
				 页面滚动而背景固定:fixed
				background-attachment: fixed;*/
				/*background-position: 200px 300px;  */
				/* 复合写法 
				background: color img repeat attachment position/size;*/
				background: gainsboro url(img/1.jpg) no-repeat fixed center/80% 
			}
			.box{
				width: 600px;
				height: 1800px;
				border: 1px solid chartreuse;
				/* transparent:透明色 */
				background-color: rgba(255, 135, 25, .4);
				background-image: url(img/1.jpg);
				/* 背景图片重复显示 :repeat
				背景图片不重复显示:no-repeat*/
				background-repeat: no-repeat;
				font-size: 36px;
			}
		</style>
	</head>
	<body>
		<div class="box">
			这是盒子内容
		</div>
	</body>
</html>
